Report To

This is Express middleware to set the Report-To HTTP response header. You can read more about it here and here.

To use:

const reportTo = require('report-to')

// ...

app.use(reportTo({
    groups: [
		{
			group: "endpoint-1",
			max_age: 10886400,
			include_subdomains: true,
			endpoints: [
				{
					url: "https://example.com/reports",
					priority: 1
				},
				{
					url: "https://backup.com/reports",
					priority: 2
				}
			]
		}
	]
}))

When set alone, this header doesn't do anything and will need to be set with a header that allows reporting, such as Content-Security-Policy, NEL, etc.

For example, using the above definition, a NEL header may look like the following, using endpoint-1 as its report-to parameter: NEL: {"report_to":"endpoint-1","max_age":31536000,"include_subdomains":true} You can use this module to set an NEL header easily with express.

https://report-uri.com/ is a great reporting platform for monitoring CSP, NEL, etc. error logs.